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Implement double return values in calls. Fixes

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SingleSource/Regression/C/casts.c.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115246 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2010-10-01 00:00:11 +00:00
parent 0488fb649a
commit 14df88282b
1 changed files with 35 additions and 9 deletions
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44
lib/Target/ARM/ARMFastISel.cpp
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@ -1162,17 +1162,43 @@ bool ARMFastISel::FinishCall(EVT RetVT, SmallVectorImpl<unsigned> &UsedRegs,
CCInfo.AnalyzeCallResult(RetVT, CCAssignFnForCall(CC, true));
// Copy all of the result registers out of their specified physreg.
assert(RVLocs.size() == 1 && "Can't handle multi-value calls!");
EVT CopyVT = RVLocs[0].getValVT();
TargetRegisterClass* DstRC = TLI.getRegClassFor(CopyVT);
if (RVLocs.size() == 2 && RetVT.getSimpleVT().SimpleTy == MVT::f64) {
// For this move we copy into two registers and then move into the
// double fp reg we want.
// TODO: Are the copies necessary?
TargetRegisterClass *CopyRC = TLI.getRegClassFor(MVT::i32);
unsigned Copy1 = createResultReg(CopyRC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
Copy1).addReg(RVLocs[0].getLocReg());
UsedRegs.push_back(RVLocs[0].getLocReg());
unsigned Copy2 = createResultReg(CopyRC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
Copy2).addReg(RVLocs[1].getLocReg());
UsedRegs.push_back(RVLocs[1].getLocReg());
EVT DestVT = RVLocs[0].getValVT();
TargetRegisterClass* DstRC = TLI.getRegClassFor(DestVT);
unsigned ResultReg = createResultReg(DstRC);
AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
TII.get(ARM::VMOVDRR), ResultReg)
.addReg(Copy1).addReg(Copy2));
// Finally update the result.
UpdateValueMap(I, ResultReg);
} else {
assert(RVLocs.size() == 1 && "Can't handle non-double multi-reg retvals!");
EVT CopyVT = RVLocs[0].getValVT();
TargetRegisterClass* DstRC = TLI.getRegClassFor(CopyVT);
unsigned ResultReg = createResultReg(DstRC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(RVLocs[0].getLocReg());
UsedRegs.push_back(RVLocs[0].getLocReg());
unsigned ResultReg = createResultReg(DstRC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(RVLocs[0].getLocReg());
UsedRegs.push_back(RVLocs[0].getLocReg());
// Finally update the result.
UpdateValueMap(I, ResultReg);
// Finally update the result.
UpdateValueMap(I, ResultReg);
}
}
return true;